Interrupt Mask Register
| RE_INT_EN | Response Error Interrupt Enable |
| CC_INT_EN | Command Complete Interrupt Enable |
| DTC_INT_EN | Data Transfer Complete Interrupt Enable |
| DTR_INT_EN | Data Transmit Request Interrupt Enable |
| DRR_INT_EN | Data Receive Request Interrupt Enable |
| RCE_INT_EN | Response CRC Error Interrupt Enable |
| DCE_INT_EN | Data CRC Error Interrupt Enable |
| RTO_BACK_INT_EN | Response Timeout/Boot ACK Received Interrupt Enable |
| DTO_BDS_INT_EN | Data Timeout/Boot Data Start Interrupt Enable |
| DSTO_VSD_INT_EN | Data Starvation Timeout/V1.8 Switch Done Interrupt Enable |
| FU_FO_INT_EN | FIFO Underrun/Overflow Interrupt Enable |
| CB_IW_INT_EN | Command Busy and Illegal Write Interrupt Enable |
| DSE_BC_INT_EN | Data Start Error Interrupt Enable |
| ACD_INT_EN | Auto Command Done Interrupt Enable |
| DEE_INT_EN | Data End-bit Error Interrupt Enable |
| SDIO_INT_EN | SDIO Interrupt Enable |
| CARD_INSERT_INT_EN | Card Inserted Interrupt Enable |
| CARD_REMOVAL_INT_EN | Card Removed Interrupt Enable |